Abstract
Amphibian robot can conserve the ecological environment at any time under the state with a changeable water level. When a live fish is imitated and a fish robot is manufactured, the robot needs only a few actuators. Newts that are amphibian swim just like fishes in water. When newts walk on the ground, the movement of newts is similar in the case of swimming. In a word, the movement of trunk is more important than detailed movement of forelegs and hind legs. In this study, a robot which imitated newt's walking and swimming functions was produced for trial purposes. This robot has the propulsive mechanism with the trunk bending and twisting. This newt robot can walked on the ground and the bottom in water, and can swim in water. The kinematic performance of the robot has been examined.
